Avon AV71 Cobra Front Motorcycle Tires - 120/70V-21 90000000746 Snakeskin sidewall effect complements the Cobra logo and tread design; a truly unique custom look Advanced Variable Belt Density (A-VBD) rear construction uses a densely wrapped belt in the center of the tire for stability, wear and mileage; belt is less dense on the shoulder for a huge, compliant contact patch Force Following Grooves (FFG) for reduced tire noise, increased wear resistance, improved stability and better resistance to cupping Lifetime Profile Engineering (LPE) for consistent handling and stability for the full life of the tire Wide Custom Tread Arc (WCTA) tire profile for improved maneuverability at all speeds